Damper



J. TANDY.

DAMPER.

APPLICATION FILED SEPT. I, 1921.

1, 11 O, 1 38. Patented Mar. 21, 1922.

2 SHEETS-SHEET ll/VVE/i/TOH 3 John Tcmd a /zzwm ,4 TTURNEYS WITNESSES J. TANDY.

DAMPER.

APPLICATION FILED SEPTfl. 1921.

1 ,410, 1 3s, Patented Mar. 21, 1922.

2 SHEETSSHEET 2.

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NVENTOR WITNESSES I I 0 nTa-nd c W m ATTORNEYS JOHN TANDY, or BfJ'TTE, floN'rANA.

DAMPER;

Specification of Letters Patent. Patentdllia 21 1922 Application filed September 1, i921. Serial no. 497,54.

To all whom it may concern:

Be it known that 1, JOHN TANDY, a citizen of the United States, and a resident of Butte, in the county of Silver Bow and State of Montana, have invented certain new and useful Improvements in Dampers, of Iwhichthe following is a specification.

My invention relates to fireplace dampers, and is intended as an improvement upon the damper for which patent issued to me Dewinner 7, 1920, No. 1,361,782, and hasfor an object to provide a device of the'chai'acter specified adapted for use in fireplaces to control the draft wherein a housing or frame is provided of a size to register with the opening of the flue, and shaped to conform with the proper arrangement of the junction of the fireplace and the flue, and having a damper capable of being operated from outside the flue for regulating the draft through the flue.

Another object is to provide a damper of this character with means for indicating the opening and closing of the damper.

In the drawings,

Figi'ire 1 is a front view of the fireplace showing" the operating handle and indicator, Figure 2 is a horizontal section above the housing, U

Figure 3 is anenlarged horizontal section of rear wall of housing,

Figure 4 is a vertical section through the fireplace and housing,

Figure 5' is an enlarged sectional view showing the operating mechanism, Figure 6 is asectional elevation. showing one of the shaft bearings,

Figure 7 is a transverse section taken on line ,7'7 of Figure 5,

Figure 8 is a similar section taken on line 88 of Figure 5, H I

Figure 9' is a similar section takenon line 9%9 of Figure 5, I T

Figure 10 is a longitudinal seetien throng-h the" speraung shaft showing: the indicator and operatin me hanism.

1n the present embodiment as in m'i iore merpatent. the inve1iuon is shown in mention with a fireplace having the o enin of combustion chamber 1 and flue 2 with which the combustion chamber communi; cates, the fireplace and flue heingconsfii'ucted of, brick. The rear wan; 3 o'f the fireplace;

is inclined forwardly" and there is provided.

a sootsfie'if 4 a't'th' tsp of this wall 3, the

top being inclined forwardly in front ofthe flue 2, p I

The front of the top of wall 3 is a-little forward with respect to the front wall of v the flue, thus providing a throat at this point between the flue and the fireplace in-which is placed the housing. c

The housing consists of an inclined front wall 5 having a horizontal plate' or shelf 6 pro ecting from its front face serving as, a medium for supporting brickwork. The housing further includes, a vertical rear wall 7'l1av ng a central or otherwise vertical corrugation 8 which is provided with a series of openlngs' 9 -to support and provide room for the shaft which op'eratesihe damper as wlllbe hereinafter, more fully set-forth. In a'ddltionto the walls 5 and 7 the housing in eludessidewalls 10 which incline downi wardly, andabottom' w;all'1-1, whichis a cover for the soot shelf. Q v

The housing is inpractice preferably a cast iron structure having its inner 7 face flush with the inner face of the flue and throat, supportedby the masonrvbelow the housing and itself supporting the masonry above. p 7

As shown in Figuref5, the front wallf5 and a portion of side walls 10 extend below the level of the soot shelf 4, and a damper plate 12 is hinged at its lower end to the soot plate 11 as indicated by P in such manner that itscloweredge when it is in closed position, restsupon the sootrplate 11 at its forward edge, the upper edge of the damper 12 engaging the inclined front wall 5 audits ends engaging the side walls 1O.v

In order to control the damper a screw threaded shaft 13 is mounted in the masonry. This is accomplished by providing the hear ing 14 and its'p-u'rpose is to keep the opera-t ingrod or shaft13 in a permanent position after brickwork; is built around it, the flanges; 15g1oeated'iii the masonry joints 16. The little flange 17 on the handle infront perirms the same duty .e'nly in the reverse wa This bearing also prevents anypos sihility of gases passing through and does not aim Without thev use ofthis bearing. theshil-ft would graduallywear the biickworkand pullout more-orless. c j As shown thesliaf't 1 3:is slotted as, indie dated by-13 in Figure 8, and? in thissloa is placed, an indiezitoiijbd, l9i1wlriehipasses- H 110 through the exii i-of the hollow rod 40 of handle which has a central bore permits the end of the indicator rod to project outwardly in front ofthe fireplace. The inner portion of the rod 19 is bent upwardly as at 20, through theslot, then forwardlyas at 21, and has a downwardly projecting lng 22 at the extreme end which extends down upon the nut beyond the annular flange or run 13 at the forward end of the nut, v

To the rear end of the screw or worm shaft 13 is secured a sin-alhrod, 23 which extends rearwardly and through the opening 9 in the central corrugations of the rear wall 7 of the housing, thus supporting the screw shaft in, proper horizontalposition. This rod 23 is secured in the endof screw shaft 13 bya cotter pin 24 which will also serve to prevent the nut running off the screw shaft 13. The rod 28 supporting the screw shaft 13 leaves it free to rotate and at r the rear provides more room for red to slide the soot shelf 4 withoutpiercing brickwork.

g A nut 25 ismonnted on thethreaded portion of thejshaft 13,a nd a rod 26 is hinged at on nd to the nutby the ears 26 which are made integral with the nut. The rod 26 extends through a sheath '27onlthe damper plate,which sheathdslhere shown as generall wedge or triangular shape, so that when thedamper is open, the sheath will lie on and bottom wall 11 of the housing; The end of rod 26 which passes through i the sheath 27 normally extends below the soot shelf, as shownin'Figures 4 and 5, and

the upper edge of the damper plate is slotted vertically as at 28 to permit passage of screw or worm shaft 13, as showuin Figured The length of the rod26 'is such that it cannotbecome disengaged from the damper at any time, whatever the position of the sheath. j a

The front wall: 5 is slotted as at 29 for the screw shaft 13, and the lower edge ofthis Figure 1), which wallrests upon the j angle plate 30 (see supports the arch of the fireplace or superimposed, masonry. A i i The indicator or signal19 is an important feature, of this invention, its purposebeing to warnthe personoperating, whether the damper gate is closing or opening aiicl to makepractically impossible the closing of the damper without knowing it, as the indicator rod will press into thehand when the damper is closing as it will protrude about one inch. As the operation ofjthe damper cannot be seen the indicator, becomes an indispensable feature; When the screw s'haftj13jis being turned, the nut 25 moves am rout e; pu sifrie ell i the dicator; the rim or flange 13* on the nut means of ahook, if necessary. i i

The purpose in slotting the screw shatftzis to make possible successfulworking ofindicator, and it is optional,whether it (theslot) passescompletely through thescrew shaft or just below the indicator rod 19. This rod passes through the handleflS and along the center of the three-eighth inchpipe or core -10, which in turn engages with the slot in the main screwshaft1.3,and is then sprung over the rim or flange "13 of the nut, 1

It should be notedthat the operatingshaft will. always fall into a joint andits handle fit the face of the brickwork. It can be raised or lowered .vertically and moved hori zontally in and out without moving the housing. i j

Iclaim: 5 V, H m 1. In a fireplace, the combination with the fireplace, the fine and the ,throat con necting the fireplace and flue, of a housing shaped to fit-the throat and provided with a soot shelf, a damper, and means operable outside the fine for moving saidjdamper into vertical position transversely ofthe throat or into inclined position to leave the throat open, said meanscomprising a rotatable screw shaft journaled in the housing, the damper having sheath or socket inclined with respect to the ,planeofthe dampenra slidable rod engagingsaidnsheath a} nut threaded onto said. rotatable screwshaft and hinged to the upperend of saidfslida blc rod, and anindicator rod carried by said shaft, one end projectingthrough the operating end of the screw shaft; and theother end adaptedto be engagedby the travelling not by pushing or pulling, whereby the indicator rod will he moved inor-out toindicate the movement of the damper. 1 2, In a firepla es, the combination withthe fireplace. the flue and the throat connecting the fireplace and "the flue, ofg a ,honsing shaped to fit, and to form thevthroat, a damper hinged within said housing, and means for operating said damper from. the outside of. the.flue, said means comprising a. worm shaft journaled in said housing, and having an operating handle connected there with outside thefireplace,, said shaft having a slotted portiornan indicator rod slidably mounted in said slotted portion, oneend proj ectingj through said operating, handle and the; other, end projecting from slot;

ted portion of the screw shaft and engageable by a nut on the screw shaft, a nut provided with means for engaging said end of the indicator rod, and a slidable rod engaging said damper, and pivotally connected at one end to said nut.

3. Damper operating means as set forth in claim 3, and further characterized by means adjacent the end of the screw shaft to prevent the nut from travelling beyond the threads thereof.

4. In a fireplace, the combination with the fireplace, the flue and the throat connecting the fireplace and the flue, of a housing shaped to fit and to form the throat, said housing including an inclined front wall, end walls, a bottom plate and a rear wall, the rear wall having a central inwardly extending vertical corrugation provided with aplurality of openings, and said inclined front wall having a vertical slot therethrough, and a threaded damper-operating shaft journaled in said slot, and an opening in the vertical corrugation of the rear wall of the housing.

5. In a fireplace, the combination with the fireplace, the flue and the throat connecting the fireplace and the flue, of a housing shaped to fit the throat and provided with a soot shelf, a damper hinged to the soot shelf,

and means operable outside of the fine for moving said damper into various angular positions transversely of the throat, said means comprising a worm shaft carrying a longitudinally movable nut, and journa ed in said housing, a rod hingedly connected at one end to said nut and slidably engaging said damper, and an indicator rod carried by said screw shaft and adapted to be engaged by said nut in its longitudinal movements, to push and pull the said indicator rod whereby movement of the damper will be indicated outside the flue.

6. In a fire place, the combination with the fire place including the flue and the throat connecting the same, a damper hinged within the throat, of means operable outside the flue for moving said damper into various angular positions transversely of the throat, said means comprising a threaded horizontal shaft, a nut longitudinally movable thereon, a rod flexibly connected at one end to said nut and movably engaging the damper, and an indicator rod movably mounted with respect to said threaded shaft and adapted to be engaged by said nut in its longitudinal movements, whereby movement of the hinged damper will be indicated outside the flue.

JOHN TANDY. 

